<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>无限挑战</title>
</head>
<style>
    body {
        margin: 0px;
        padding: 0px;
        font-family: "微软雅黑";
        -webkit-user-select: none;
        word-wrap: break-word;
        word-break: break-all;
        height: 100%;
        background: url(images/challenge.jpg) center;
        background-size: 100% 100%;
    }
    html{
        width: 100%;
        height: 100%;
        margin:0;
        overflow: auto;
    }
</style>
<body>

</body>
</html>